<template>
  <div class="main_class">
    <router-view></router-view>
  </div>
</template>
<style>
html, body, main_class {
  margin: 0;
  padding: 0;
}

.page_box {
  display: flex;
  justify-content: end;
}

.item_center {
  display: flex;
  justify-content: center;
}

.box_size {
  width: 1200px;
}
</style>
